Definition

A purple pigment found in the eyes of some freshwater fish and certain frogs, which is similar to another pigment called rhodopsin.

Example

Porphyropsin helps freshwater fish see in low light conditions.

Conversation

Did you know that some fish have a pigment called porphyropsin?

Really? I've never heard of that before.

Yeah, it's similar to rhodopsin and helps them see in low light.

That's fascinating! Nature has some amazing adaptations.

Synonyms & Antonyms

Root Explanation

Porphyropsin is formed from "porphyra" (from Greek "πορφύρα", meaning purple) and "opsin" (from Greek "ὄψις", meaning vision or sight). The word refers to a purple pigment involved in vision, particularly in the eyes of certain animals.

Memory Tip

Think of the Greek word for purple ('porphyra') and how it relates to vision ('opsin') — this helps you remember that porphyropsin is a purple pigment important for sight.

Visually Confused Words